How to use

WithOptionalEntity

in

org.eclipse.ditto.signals.base

/**
 * Returns the entity as JSON.
 *
 * @return the entity as JSON.
 */
default Optional<JsonValue> getEntity() {
  return getEntity(JsonSchemaVersion.LATEST);
}

/**
 * Returns the entity as JSON.
 *
 * @return the entity as JSON.
 */
default Optional<JsonValue> getEntity() {
  return getEntity(JsonSchemaVersion.LATEST);
}

private static WithDittoHeaders checkForHarmfulEntity(final WithDittoHeaders withDittoHeaders) {
  if (withDittoHeaders instanceof Command && withDittoHeaders instanceof WithOptionalEntity) {
    final Optional<JsonValue> optionalEntity = ((WithOptionalEntity) withDittoHeaders).getEntity();
    if (optionalEntity.isPresent() && isJsonValueIllegal(optionalEntity.get())) {
      throw buildError(withDittoHeaders);
    }
  }
  return withDittoHeaders;
}

private static Function<HttpResponse, HttpResponse> createBodyAddingResponseMapper(
    final CommandResponse commandResponse, final WithOptionalEntity withOptionalEntity) {
  return response -> {
    if (StatusCodes.NO_CONTENT.equals(response.status())) {
      return response;
    } else {
      return withOptionalEntity.getEntity(commandResponse.getImplementedSchemaVersion())
          .map(entity ->
              addEntityAccordingToContentType(response, entity, commandResponse.getDittoHeaders()))
          .orElse(response);
    }
  };
}